Malicious PDF — malware analysis report

Static analysis result for SHA-256 1074c731e51b0fdf…

MALICIOUS

PDF

48.5 KB Created: 2020-08-12 01:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db14723a305654bce759d5d4d35be291 SHA-1: dc98414537b6a8438117a9c990ac52f122daccf3 SHA-256: 1074c731e51b0fdf73397e18905e2dde4ad5f2aa6e61aa3f83a40b9f2c657d4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=comparative+anatomy+of+brain+in+vertebrates+pdf', which is known to lead to malicious content. The document's structure suggests it is part of a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous malicious links indicates a high likelihood of user redirection to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=comparative+anatomy+of+brain+in+vertebrates+pdf
    • http://files.thenaturaledge.us/uploads/1/3/0/8/130814121/8035970.pdf
    • http://files.imagesstratford.com/uploads/1/3/2/6/132696233/84942133a9.pdf
    • http://zogozexoz.enlivenhere.com/uploads/1/3/0/9/130969162/1745223.pdf
    • http://files.briankingwebsite.com/uploads/1/3/2/3/132303245/ca061a6ca269.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2982/2625/files/les_4_accords_toltques_don_miguel_ruiz_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/51737440778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/92880334759.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1555/files/define_utilitarianism.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/enviar_mail_con_phpmailer.pdf
    • https://cdn.shopify.com/s/files/1/0430/0547/7023/files/98254452218.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/rupedenavetub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/fevikidabilixamejurexew.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/1724367040.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/tipping_point.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/cheat_codes_for_need_for_speed_carbon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/winrar_vn_zoom.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008171.bin
8ad0f0039df27780fdcb8f8a8c36cc76395f45e54ffc9bfb20cb3265716f0a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8171 5360 bytes
font_01_sfnt_off00009390.bin
db5fc52a793c27b767c18282d72a7b36f5c5fb9d0111c58f13345697b31974da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9390 9572 bytes

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